They are light. Narrow and I think they are great. I also got a set of Givi top box mounting hardware so Jan now has something to stop her from toppling off the back of the bike. hehehehehehe.
She also now has a triboseat grippy seat cover. This is a very simple bit of mesh that attaches to the seat and stops her from sliding forward. It works that well I would be worried about getting a wedgey from it.